Here is the full list of all 23 Turbo Dismount achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Perform 1000 decapitations.
Launch 1000 dismounts.
Fully obliterate Mr. Dismount.
Totally demolish all vehicles (that can be demolished).
Cut down 100 trees.
Complete 100 dismounts with the Pink Lightning.
Nail it 100 times.
Drive through 1000 turbo pads.
Totally demolish a single vehicle.
Pull ten somersaults in a single dismount.
Play a Steam Workshop level.
Try everything once.
Launch three consecutive dismounts at max velocity.
Do ten strikes with the Bowling Pins.
Get hit by five different NPC vehicles in T-Junction.
Cross the finish line on Skid Marks at 88mph.
Reach a record time on Skid Marks.
Do a successful barrel roll and landing.
Reach a height of 1000ft (305m) in Space Program.
Detonate ten mines in a single dismount on Run DMZ.
View a replay in slow motion.
Customize Mr. Dismount or a vehicle.
Lose only a single limb during a single dismount.